View Compilation Error

0_0_15312393_19601.c: In function 'fun':
0_0_15312393_19601.c:9:2: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
  for(int i = 0;i<=3;i++)
  ^
0_0_15312393_19601.c:9:2: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_15312393_19601.c: In function 'main':
0_0_15312393_19601.c:43:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i = 1;i<=n;i++)
   ^
0_0_15312393_19601.c:45:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for(int j = 1;j<=m;j++)
    ^